1·It is difficult to have good performance for chain boiler combustion control system due to large delay time, varying coal's quality and steam load.
大纯时延、煤种多变和蒸汽负荷频繁变化是链条炉难以进行良好燃烧控制的原因。
2·Several design methods and their experimental results are introduced. Design of acoustic cascade is firstly put up, which is effectively used in 1024 bits long delay time SAWTDL construction.
介绍了1024位声表面波抽头延迟线（SAWTDL）的几种设计结构及试验结果。其中声学级联结构为首次提出，是解决高位、长时延SAWTDL设计的行之有效的结构。
3·BP algorithm replaces the concept of phase with delay time, so it is irrelevant to frequency and the problem of range migration correction does not exist.
BP算法由于用时延代替了相位的概念，故与频率无关，不存在距离徙动校正的问题。
4·Finally, the relationship between buffer capacity, mean delay time and the jam radom of system is discussed.
最后，文章中讨论了缓冲器容量、平均时延与系统阻塞概率之间的关系。
5·Simulation results show that the scheme can guarantee the stability and improve the operation performance to a certain extent if the delay time is identified accurately enough.
仿真结果表明，只要对时延的辨识足够精确，该方法能够在保证系统稳定的前提下一定程度上提高系统的操作性能。